According to a recent press release, the Pennsylvania Department of Environmental Protection has "released detailed sampling and quality assurance plans for its ongoing comprehensive radiation study of oil and gas development. The agency will sample and analyze radioactivity levels of flowback waters, treatment solids, drill cuttings and drilling equipment, along with the transportation, storage and disposal of drilling wastes."  Importantly:  "Based on current data, regulations and industry practices, there is no indication that the public or workers in the oil and gas industry face health risks from exposure to radiation from these materials. The study is aimed at ensuring that public health and the environment continue to be protected."  (Emphasis is ours.)